linux-kernel - Re: [PATCH v5 00/10] perf sched: Introduce stats tool

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Message-ID: <20260121195155.GP166857@noisy.programming.kicks-ass.net>
Date: Wed, 21 Jan 2026 20:51:55 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Ian Rogers <irogers@...gle.com>
Cc: "Chen, Yu C" <yu.c.chen@...el.com>,
	Swapnil Sapkal <swapnil.sapkal@....com>, ravi.bangoria@....com,
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Subject: Re: [PATCH v5 00/10] perf sched: Introduce stats tool

On Wed, Jan 21, 2026 at 09:12:20AM -0800, Ian Rogers wrote:

> I'm still wondering if we can make some of the /proc/schedstat data
> appear as tool events similar to proposals for networking and memory
> tool events in:
> https://lore.kernel.org/lkml/20260104011738.475680-1-irogers@google.com/

Yeah, someone with a bit of spare time could make it happen:

  https://lkml.kernel.org/r/20250703141800.GX1613200@noisy.programming.kicks-ass.net

It would be:

 - convert all the accounting sites to tracepoints
 - write modules that connect to relevant tracepoints to provide the
   'legacy' interface
 - convince world+dog to not auto-load above modules
 - have beer and wait for people to complain about something :-)

I'm sure there's 'interesting' details glossed over, but I *think* it
should be doable.